Wednesday, August5, 2020
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Marine Weather and Tides
Wailua, HI

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:06AMSunset 7:10PM Wednesday August 5, 2020 2:52 PM HST (00:52 UTC) Moonrise 9:05PMMoonset 8:01AM Illumination 96% Phase: Waning Gibbous; Moon at 17 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PHZ113 Kauai Channel- 938 Am Hst Wed Aug 5 2020
Rest of today..East winds 20 knots. Wind waves 5 feet. Southeast swell 3 feet. Isolated showers.
Tonight..East winds 20 knots. Wind waves 6 feet. Southeast swell 3 feet. Scattered showers.
Thursday..East winds 15 knots. Wind waves 6 feet. Southeast swell 3 feet. Scattered showers.
Thursday night..East winds 15 knots. Wind waves 6 feet. Southeast swell 3 feet in the evening. Scattered showers.
Friday..East winds 15 knots. Wind waves 6 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Friday night..East winds 20 knots. Wind waves 6 feet. Southeast swell 3 feet after midnight. Isolated showers.
Saturday..East winds 20 knots. Wind waves 6 to 7 feet. Southeast swell 3 feet. Isolated showers.
Sunday..East winds 20 knots. Wind waves 6 to 7 feet. Southeast swell 3 feet. Isolated showers.
PHZ100 938 Am Hst Wed Aug 5 2020
Synopsis for hawaiian coastal waters.. High pressure will remain far north of the islands through the forecast period.


7 Day Forecast for Marine Location Near Wailua, HI
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location: 22, -159     debug


Area Discussion for -
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FXHW60 PHFO 051954 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 954 AM HST Wed Aug 5 2020

SYNOPSIS. A strong surface high will remain north of the islands through at least early next week. Breezy easterly trade winds will focus showers over mainly windward areas, with afternoon showers over the leeward side of the Big Island of Hawaii. An area of moisture moving west over the islands may make showers more active tonight through Friday.

DISCUSSION. As of 8 AM, the surface analysis shows a 1031 mb high centered about 1080 miles north of Honolulu near 37N 155W. The high will maintain locally breezy easterly trade winds over the main Hawaiian islands as it moves slowly northeast and strengthens through early next week. Satellite loops show mostly cloudy skies over windward areas and mostly sunny skies over leeward areas with clear skies over the high elevations of the Big Island and Maui. Radars show isolated showers moving toward the islands in the trade-wind flow. Clouds and showers will develop over the lee slopes of the Big Island and Maui this afternoon, otherwise little change is expected through this evening.

An area of more-humid air is forecast to move west across the islands through Friday. This will likely produce an increase in windward showers tonight through Friday morning. Some of these showers may spread leeward over the smaller islands, mainly during the night and morning hours. The increased moisture may also fuel an increase in afternoon showers over the lee slopes of the Big Island and Maui through Friday.

Over the weekend, drier air will spread over the islands from the east. Trade winds will strengthen over the weekend and could get strong enough to require issuance of Wind Advisories.

AVIATION. High pressure north of Hawaii will help to maintain moderate to breezy trade wind flow through this evening. An area of enhanced moisture upstream is forecast to move over the area from the east later today and into tonight. This will bring scattered to numerous showers to the windward sections of the islands with MVFR ceilings and visibility likely. Isolated to scattered showers elsewhere.

AIRMET TANGO remains in effect below 8000 feet for areas over and immediately south through west of mountains.

MARINE. Strong high pressure far north north of the area will remain nearly stationary maintaining locally strong trade winds over the area. A Small Craft Advisory (SCA) continues for the windier areas near Maui County and the Big Island into this weekend. Winds could increase this weekend that would extend the SCA for the existing areas, and could require the SCA to be expanded to additional waters.

A small, and fairly short-period, southeast swell will persist into next week but the Big Island will block some of this swell from reaching the rest of the islands. Long-period swells from deep in the southern hemisphere will remain small, but help to keep surf along the south shores elevated. Small surf along east facing shores will build through the weekend as trade winds strengthen.

HFO WATCHES/WARNINGS/ADVISORIES. Small Craft Advisory until 6 PM Saturday for Maalaea Bay, the Pailolo and Alenuihaha Channels and waters south of the Big Island.



DISCUSSION . Donaldson AVIATION . Thomas MARINE . M Ballard/Blood


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 19 mi59 min NE 8 G 12 80°F 84°F1018.8 hPa
51201 - Waimea Bay, HI (106) 52 mi57 min 81°F4 ft

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI19 mi60 minNE 910.00 miOvercast83°F73°F74%1018.7 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)
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NE12NE11NE16NE13NE15NE16E16E16NE14E13E13E15E14E13E15E14E13NE13NE13NE10NE10NE16NE9
1 day agoNE10NE14NE11NE13NE13NE15NE17NE15NE15NE15E15NE12NE10NE12NE14NE12NE17N5N7E12E12NE9E11NE11
2 days agoNE16NE15NE13NE13NE14NE15E15E17E16E14E16E14E14E17E15E14E18
G22
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Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Hanamaulu Bay
Click for Map
Wed -- 04:54 AM HST     0.87 feet High Tide
Wed -- 06:11 AM HST     Sunrise
Wed -- 08:02 AM HST     Moonset
Wed -- 10:07 AM HST     0.20 feet Low Tide
Wed -- 05:16 PM HST     2.04 feet High Tide
Wed -- 07:14 PM HST     Sunset
Wed -- 09:05 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.30.50.70.80.90.80.70.50.30.20.30.50.81.21.61.9221.81.410.60.4

Tide / Current Tables for Nawiliwili, Hawaii
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Nawiliwili
Click for Map
Wed -- 04:33 AM HST     0.96 feet High Tide
Wed -- 06:11 AM HST     Sunrise
Wed -- 08:02 AM HST     Moonset
Wed -- 10:04 AM HST     0.10 feet Low Tide
Wed -- 05:18 PM HST     2.03 feet High Tide
Wed -- 07:14 PM HST     Sunset
Wed -- 09:05 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.50.70.80.910.80.60.40.20.10.20.40.81.21.61.9221.81.41.10.70.5

Weather Map
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wmap_P
GEOS Local Image of Hawaii    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (20,4,5,8)
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Ground Weather Radar Station Kauai, HI
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weather_mapweather_map weather_map

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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.